https://bugs.freedesktop.org/show_bug.cgi?id=103813
Peter Hutterer <[email protected]> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEEDINFO |NEW
--- Comment #8 from Peter Hutterer <[email protected]> ---
the stair pattern should be gone with the hysteresis gone?
If one prints the per-slot deltas the problem is visible:
0.148118: | *********** |
0.176980: | *********** |
0.207288: | *********** |
0.226218: | *********** |
0.236147: | *********** |
0.246356: ↑↗ 31/ -43 | *********** |
0.314911: →↘ 31/ 7 | *********** |
0.325129: →↘ 31/ 4 | *********** |
0.335191: →↘ 31/ 1 | *********** |
0.364298: →↗ 31/ -6 | *********** |
0.374541: →↘ 31/ 4 | *********** |
0.383795: →↘ 31/ 1 | *********** |
0.393685: →↘ 7/ 1 | *********** |
0.403613: →↘ 5/ 1 | *********** |
0.413709: →↘ 1/ 1 | *********** |
0.423796: ↓↘ 1/ 4 | *********** |
0.432893: →↘ 1/ 1 | *********** |
0.443063: →↘ 1/ 1 | *********** |
so no movement, then several movemnts with 31 units (42 units == 1mm), then
smaller movements. This repeats often:
2.167606: →↘ 1/ 1 | *********** |
2.177573: →↘ 1/ 1 | *********** |
2.187647: →↘ 4/ 1 | *********** |
2.196651: ↓↘ 1/ 18 | *********** |
2.206751: →↘ 20/ 18 | *********** |
2.226926: ↓↘ 1/ 18 | *********** |
2.236070: ↓↘ 1/ 18 | *********** |
2.246686: ↓↘ 1/ 18 | *********** |
2.255925: ↓↘ 1/ 18 | *********** |
2.265937: ↓↘ 1/ 18 | *********** |
2.275980: ↓↘ 1/ 18 | *********** |
2.285035: ↑↗ 1/ -7 | *********** |
That 20 in there would give you a jump. In other words, the data coming out of
the device is bad and we need some code to detect and paper over these jumps.
Not sure how to do this yet, suggestions appreciated
Tool used:
https://github.com/whot/input-data-analysis/tree/master/per-slot-deltas
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